Hauzu'l-Kausar
In Islamic context, the Hauzuʾl-Kausar is the lake or fountain of abundance in Jannah (paradise). Persons having crossed the As-Sirāt arrive at this lake, from which one is expected drink to forget any bad experiences they may have had during their lives, before moving further into paradise.
As the term kausar only occurs once in the Qurʾan, its exact meaning is subject to different interpretations. It is also known as the lake of good the pond of Muhammad and the sacred fountain of heaven.